document.write( "Question 934345: What grade would would I need to keep 90 in a class. I have 99 and the final exam counts as 20 percent. \n" ); document.write( "

Algebra.Com's Answer #567431 by TimothyLamb(4379) $\"\"$ $\"About$

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(1 - 0.20)*99 + 0.20x = 90
\n" ); document.write( "0.20x = 90 - (1 - 0.20)*99
\n" ); document.write( "x = ( 90 - (1 - 0.20)*99 ) / 0.20
\n" ); document.write( "x = 54
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\n" ); document.write( "get 54 or higher on the final exam
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